Finding the Fourth Proportional to 144,178,956.59, 198,967,915.18 and 78,099,453.99
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Solution
The fourth proportional to 144,178,956.59, 198,967,915.18 and 78,099,453.99 is: 107,777,763.86
Step by Step Solution
- Step 1: Write the proportion equation
144,178,956.59 : 198,967,915.18 = 78,099,453.99 : x - Step 2: Convert to fraction form
144,178,956.59/198,967,915.18 = 78,099,453.99/x - Step 3: Cross multiply
144,178,956.59x = 198,967,915.18 × 78,099,453.99 - Step 4: Simplify right side
144,178,956.59x = 15,539,285,536,854,676 - Step 5: Solve for x
x = 15,539,285,536,854,676/144,178,956.59 - Step 6: Final answer
x = 107,777,763.86
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.